210020663139109 has 2 divisors, whose sum is σ = 210020663139110. Its totient is φ = 210020663139108.

The previous prime is 210020663139061. The next prime is 210020663139143. The reversal of 210020663139109 is 901931366020012.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 208170935296900 + 1849727842209 = 14428130^2 + 1360047^2 .

It is a cyclic number.

It is not a de Polignac number, because 210020663139109 - 2¹⁵ = 210020663106341 is a prime.

It is a super-3 number, since 3×210020663139109³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210020663131109) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105010331569554 + 105010331569555.

It is an arithmetic number, because the mean of its divisors is an integer number (105010331569555).

Almost surely, 2^{210020663139109} is an apocalyptic number.

It is an amenable number.

210020663139109 is a deficient number, since it is larger than the sum of its proper divisors (1).

210020663139109 is an equidigital number, since it uses as much as digits as its factorization.

210020663139109 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 43.

The spelling of 210020663139109 in words is "two hundred ten trillion, twenty billion, six hundred sixty-three million, one hundred thirty-nine thousand, one hundred nine".